Full diagnosis
We test the actual cause — and every diagnosis includes a full vehicle health & safety inspection.
$150flat — inspection included
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Car advice · Green Light Automotive
Why is my AC blowing hot air?
Short answer: most of the time the refrigerant has leaked low, and the system is protecting itself by shutting the compressor down. A recharge without finding the leak is a countdown to warm air again — usually right in the middle of July.
The real story
Refrigerant doesn't get used up. It escapes.
Your AC is a sealed loop. If it's low, the refrigerant went somewhere — a tired o-ring, a corroded line, a condenser that caught a rock on US-20. Finding that exit point is the actual repair; the recharge is just the refill afterward.
It isn't always a leak. Compressors and their clutches wear out, blend doors stick (heat on one side, cold on the other is the tell), blower motors quit, and electrical controls fail. Each has a different fix and a very different price — which is why guessing is expensive.
We diagnose the actual cause — $150, full inspection included — and quote the fix before touching anything. The details live on our AC & heating page.
Clues that narrow it down
What your AC's behavior is telling you.
- Blows warm all the time — likely low refrigerant or a compressor that isn't engaging.
- Cold on the highway, warm at idle — a classic airflow/condenser clue worth diagnosing.
- Cold on one side, warm on the other — usually a blend door or actuator.
- Click or rattle when the AC kicks on — compressor clutch territory.
- Weak airflow even on high — blower motor or a plugged cabin filter.
- Worked yesterday, dead today — often electrical: fuse, relay, or clutch.
The fix starts here
Diagnose the cause, then quote the cure.
The repair itself
Quoted after we've seen exactly what's wrong — and confirmed with you before any work starts.
Quoted firstbacked by a 1 yr / 12k mi warranty
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FAQ
AC questions, answered straight.
Can I just use a recharge can from the parts store?
We'd rather you didn't. DIY cans make it easy to overcharge the system — which hurts cooling and stresses the compressor — and many contain sealants that can clog the system and complicate a proper repair later.
How much does AC repair cost?
Honestly: it ranges. A leaking o-ring is a small job; a failed compressor is a bigger one. That's exactly why we diagnose first for a flat $150 and give you a firm quote before any repair work starts.
Why did my AC quit gradually over a couple of summers?
That's the signature of a slow leak — a little refrigerant escaping each season until the system can't keep up. Slow leaks are findable and fixable; that's the repair worth doing once, properly.
Do you fix weak heaters too?
Yes — same climate system, and in an Idaho January a working heater and defroster is a safety item. Weak heat can be low coolant (worth catching for other reasons), a plugged heater core, or a blend door.
Related: All car advice · AC & heating · Cooling system
Good to know
No waiting room — plan to drop off.
If you can leave the vehicle with us for the day, that's the best way to get it done right. We'll call or text with findings before any work starts.
Book a drop-off time- 🚗Diagnosis & repairs: plan on at least 5 hours — full-day drop-off is ideal.
- 🕑Oil changes & inspections: usually 60–90 minutes.
- 💰No surprises: pricing is confirmed with you before work begins.
Green means go
Fix it once, before the heat wave.
Book online — we'll find the real cause and quote it straight.